RE: Hangar 9 1/4 Scale Piper Cub ARF???
To the flyer that did a cartwheel at 10 feet with his ARF Cub, I don't care how much glue was or was not on the firewall joint.
The firewall has a pretty good chance of coming out.
My new PNP J-3 seems to have a secure firewall. I checked it before running the engine and no movement.
I ran the engine for more than an hour and still no movement.
I didn't bother to pull the tank and ignition battery out to check for glue on the inside, but it's tight as of today.